Catalyzed SCR Filter and Emission Treatment System
US-2015126358-A1 · May 7, 2015 · US
Exhaust emission control system of internal combustion engine
US9482133B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9482133-B2 |
| Application number | US-201214652830-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 18, 2012 |
| Priority date | Dec 18, 2012 |
| Publication date | Nov 1, 2016 |
| Grant date | Nov 1, 2016 |
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Abstract
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In order to suppress ammonia from flowing out during regeneration treatment of a filter carrying an SCR catalyst, the prevent invention provides an exhaust emission control system of an internal combustion engine, including a first stage catalyst having an oxidation function, a fuel supply device configured to supply fuel to the first stage catalyst, a filter provided in the exhaust passage downstream of the first stage catalyst and carrying a selective redaction type NOx catalyst, an ammonia supply device configured to supply ammonia to the filter, a filter-regeneration-treatment executing unit configured to execute filter regeneration treatment, and a control unit configured to supply, when the filter regeneration treatment is not executed, the ammonia in an amount corresponding to an amount of the NOx emitted from the internal combustion engine, and to supply, when the filter regeneration treatment is executed, the ammonia in an amount corresponding to an amount of the NOx obtained by subtracting, from the amount of the NOx emitted from the internal combustion engine, an amount of the NOx reduced by the fuel which passes through the first stage catalyst.
First claim
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The invention claimed is: 1. An exhaust emission control system of an internal combustion engine, comprising: a first stage catalyst provided in an exhaust passage of an internal combustion engine and having an oxidation function; a fuel supply device configured to supply fuel to the first stage catalyst; a filter provided in the exhaust passage downstream of the first stage catalyst and configured to collect particulate matter in exhaust gas, the filter carrying a selective r…
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Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Cross-Sectional Technologies · mapped topic
Cross-Sectional Technologies · mapped topic
Mechanical Engineering · mapped topic
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- What does patent US9482133B2 cover?
- In order to suppress ammonia from flowing out during regeneration treatment of a filter carrying an SCR catalyst, the prevent invention provides an exhaust emission control system of an internal combustion engine, including a first stage catalyst having an oxidation function, a fuel supply device configured to supply fuel to the first stage catalyst, a filter provided in the exhaust passage dow…
- Who is the assignee on this patent?
- Takada Keishi, Ohashi Nobumoto, Nakayama Shigeki, and 7 more
- What technology area does this patent fall under?
- Primary CPC classification F01N3/208. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Nov 01 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).